Photosynthesis & Cellular Respiration Questions Review Answers

Photosynthesis & Cellular Respiration Questions – Review Answers

1.  Write the summary reaction for photosynthesis.

·  6CO2 + 6H2O + light energy -> C6H12O6 + 6O2

2.  Write the summary reaction for cellular respiration.

·  C6H12O6 + 6O2 -> 6CO2 + 6H2O + ATP!!!!

3.  What is the relationship between the two equations above?

·  The products of the reaction for photosynthesis are the reactants in cellular respiration and vice versa.

4.  Where (which reaction) in photosynthesis is the light energy used?

·  The light reaction.

5.  Where in photosynthesis is CO2 used?

·  Calvin Cycle

6.  Where in photosynthesis is H2O used?

·  Light Reactions

7.  In photosynthesis, which reaction produces oxygen?

·  Light reactions, split water into electron carriers.

8.  In photosynthesis which reaction produces glucose?

·  Calvin cycle, carbon fixation.

9.  In photosynthesis which reaction produces water?

·  Calvin cycle, the water is released into the atmosphere.

10.  What is the purpose (the desired end product) of photophosphorylation (the light reaction)?

·  ATP – ADP + P + hydrogen + O2

11.  What is the “purpose” of the Calvin cycle?

·  Creates glucose (a six carbon chain)

12.  What is the name of the building block for glucose?

·  PGAL (2 PGAL = 1 glucose)

13.  Where (which reaction) in cellular reaction is oxygen used?

·  Aerobic = electron transport chain – the final receptor for oxygen.

14.  Where in cellular respiration is C6H12O6 used?

·  Glycolysis = broken down to 2PGAL (releasing electrons)

15.  Where in cellular respiration is water used?

·  Krebs cycle

16.  In cellular respiration, which reaction produces CO2?

·  Krebs cycle

17.  In cellular respiration, which reaction produces ATP?

·  Anaerobic = 2ATP

·  Aerobic = Krebs cycle = 2 ATP, electron transport chain = 32 ATP

·  In total – both anaerobic and aerobic cellular respiration make 36 ATP

18.  In cellular respiration, which reaction produces H2O?

·  Glycolysis and the electron transport chain.

19.  What is the purpose of glycolysis?

·  To make 2 pyruvic acids (acetyl acid – coA)

20. What is the purpose of the Kreb’s cycle?

·  To make 2 H and 2CO2 and 2 ATP

21.  What is the purpose of the electron transport chain?

·  To make H2O and 36 ATP

22. Why is it preferable to use aerobic (with oxygen) respiration over anaerobic respiration?

·  More ATP produced because the mitochondria can only accept carbon molecules in the presence of oxygen.